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Effects of water content on the properties of starch/poly(ethylene–vinyl alcohol) blends
Author(s) -
Dell Paul A.,
Kohlman William G.
Publication year - 1994
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1994.070520301
Subject(s) - ultimate tensile strength , materials science , vinyl alcohol , rheology , copolymer , water content , composite material , morphology (biology) , starch , rheometer , chemical engineering , melt flow index , polymer chemistry , chemistry , polymer , organic chemistry , geotechnical engineering , biology , engineering , genetics
The physical properties of unmodified starch, poly(ethylene vinyl alcohol), glycerol, and water mixtures are reported. Thermal and melt‐flow properties of the preprocessed, physically mixed materials were determined along with the tensile properties and morphology of injection‐molded microtensile samples. Melt‐flow properties were measured by a capillary rheometer, and the water content was varied from 4 to 18%. The morphology, rheology, and tensile properties are all highly related to the percentage of water present. A transition in the tensile properties and morphology of the blends was observed at approximately 11% moisture content. © 1994 John Wiley & Sons, Inc. This article is a US Government work and, as such, is in the public domain in the United States of America.